Blastic table without accurate velocity??

[Roadwild17]

Is it possible to get an accurate data table without having a chrono to get velocity??

The rifle in question is a R700 ACC-SD 20" with 168 Black Hills SMK, can I get close looking at other data tables?

 

[Lowlight]

Yes it's called going to the range and actually shooting the gun and writing the information down.

 

[Punisher29073]

Hmmmmmm. Tell me more about this new technique.....

Ryan

 

[Roadwild17]

Well thats the ultimate goal, hoping to get something to get a start?? Or should I just zero at 100 and get ups for every whay 50 yds??

 

[Lowlight]

Not a bad idea, and it's how things were down before computers.

But again, you asked about an "accurate data table" and to get accurate you need valid data, you cannot wing it call it accurate.

Zeroing at 100 yards is smart too, as everything is up from there, and after 200 yards, (use .5 or 2MOA) you can add 3.5MOA or 1 Mil to each yard line and it will get you close enough to not waste ammo but it's nowhere near "accurate" .

 

[CoryT]

Just for general info, here's the normal procedure for getting dope without knowing anything at all about the round in question.

Zero at 100 yards.
Go to 200 and shoot a group on paper. Measure the distance from the center of the group to the POA, convert to your scope adjustments and dial it on. Shoot to confirm the adjustment is correct.
Go to 300 and with the 200 yard dope dialed on, shoot a group on paper and repeat the above procedure.

It's generally not easy to set this up past 300, as the drop is going to require a very tall target. Up to 300 yards, an 8.5 x 11 inch sheet of paper with the aiming point at the top will work fine. Past 300, use at least two sheets in a vertical arrangement. For 400, take the difference between your 200 yard and 300 yard dope and add that to 300 for your initial shots. That should put you quite close, requiring only a minor adjustment to get dead on. Repeat this procedure for 500 and 600. After 600, add the difference between 500 and 600 plus about 30%. As you continue to 1000-1200, you'll see a trend of needing a little more than the difference between ranges, as you reach the back end of the curve.

This system is reliable, and consumes no more ammo than working off some generated data out of a program, and it works even if you have no clue as the velocity, BC, bullet weight or anything else. For example, you get an SVD and some 7N14. I don't have any load data handy to tell me about it's performance, but I do have a range. Complete data to 1200 yards should take < 150 rounds total, which is hardly any more that you'd need to shoot to check the computer data anyway.